Hich all were downregulated. Only three genes (CelB, CglA, Ccs4, with an addition of one unique entry CoiA) were differentially expressed in the DM3PEN-treatment group. CoiA was upregulated in the combination treatment. Cells treated with DM3 alone could have greater alteration in competence regulatory activity than PEN or the combination treatment. S. pneumoniae has capsular polysaccharide (CPS)